Plenty of good tutorials with a little searching.
I have been a member of xbox-scene.com for several years.
That would be a good place to start.
Will see if I can dig up some for ya' this afternoon (running a bit tight on time at the moment).
Might search xclamp mod through google. That could do some good for the RROD.
One site for this is The Llama
The link will take you directly to the x-clamp tutorial.
I would much rather go to my grave not needing my gun, than go there wishing I had it.